Neurocritical intensive care units (NCCUs) deal with neurologic angiographic procedures on a daily basis and in multiple ways. Acutely ill patients who suffer a stroke (be it ischemic or hemorrhagic) or an extra-axial hemorrhage, or those who experience vasospasm, may need angiographic assessment to clarify and/or treat an acute underlying pathology. On the other end of the acuity spectrum, the NCCU may be needed for the immediate postoperative care of a patient who has received elective neuroendovascular treatment for a cerebral or spinal vascular condition. It is important for the neurointensivist to be familiar with basic technical concepts and ordering rationale for cerebral and spinal angiography as well as with pre- and post-procedural needs of patients undergoing both diagnostic and interventional neuroradiological procedures. The purpose of this chapter is to illustrate strengths and weaknesses of neuroangiography as well as the correct indications and management concepts in order to allow neurointensivists to appropriately order these exams and effectively take care of patients before and after neuroendovascular procedures.